You should look to input blocks

[WASasquatch]

The results from FreeU often cause a colors to be far too intense (with default values) often causing burning that is specifically something looked to be avoided. Applying your method to the input_blocks provides extra details, without the cost of color burning. I have made a mod of this called FreeU Advanced for ComfUI that does this (among other experiments) if you want to take a look.